Stator



G. H. LELAND Aug. 13, 1935.

KML6

STATOR Filed Sept. 24, 1954 2 Sheets-Sheet l E'EUFEE'E y H5 4 W W 2&1 1,069

G. H. LELAND Aug. 13, 1935.

STATOR Filed Sept. 24, 1934 2 Sheets-Sheet 2 v 550 515 b @m Patented Aug. 13, 1935 STATOR George H. Leland, Dayton, Ohio, assignor of onehalf to The Leland Electric Company, Dayton, Ohio, a corporation of Ohio Application September 24, 1934, Serial No. 745,301

25 Claims. (01. 171 ,252)

UNITED STATES PATENT OFFICE This invention relates to a stator for electrical apparatus and is designed more particularly for use in electric motors.

One object of the invention is to provide a stator of the laminated type which will be simple in construction and can be produced at a low cost. I

A further object of the invention is to provide such a stator which can be quickly and easily assembled and in which the several parts will be rigidly held in their assembled positions.

A further object of the invention is to provide such a stator with ventilating passageways through which air may be circulated.

A further object of the invention is to provide a stator which will be of a strong rugged construction.

Other objects of the invention will appear as the device is described in detail.

In the accompanying drawings Fig. 1 is an end elevation of a stator embodying my invention, partly in section and showing a portion of one of the end frames; Fig. 2 is a detail view of a. portion of one of the laminae; Fig. 3 is a section taken on the line 33 of Fig. 1; Fig. 4 is a section taken on the line 4-4 of Fig. 1; Fig. 5 is a detail view of one of the locking plates; and Fig. 6 is a detail view of one of the side plates.

In these drawings I have illustrated one embodiment of my invention and have shown the same as applied to a stator for a motor of a well known type but it will be understood that the invention may be applied to stators of various kinds and that the several parts thereof may take various forms Without departing from the spirit of the invention.

In the particular embodiment here illustrated the stator comprises a plurality of laminae l0 punched from sheet metal and rigidly connected one to the other. Each lamina of the stator is provided with a plurality of peripheral projections ll spaced apart circumferentially thereof and separated one from the other by depressions or narrow portions of the lamina, as shown at H. In the present stator each lamina is provided with four projections spaced equal distances apart, the arrangement being such that the lamina may be punched from sheet metal with a very small waste of stock, thereby enabling it to be produced at a relatively low cost. It will be noted that the shape of the lamina is such that it can be punched from a square sheet of material having a width no greater than the shortest diameter of the lamina, that is, the diameter through the depressed margins l2. Each projection II has at each end thereof a seat, here shown as a slot 13 which is slightly inclined inwardly, the seats or slots in the adjacent ends of the respective projections being thus arranged in opposed relation. The several lamina '5 are assembled with the corresponding projections l l thereof in alinement, axially of the stator, and the corresponding notches or seats [3 are thus brought into alinement so as to form continuous recesses extending across the stator.

The several laminae are held in their proper relative positions by locking members l4 spaced apart circumferentially of the stator, each locking member having its ends firmly connected with the lamina, as by seating the ends of the locking 15- member in the respective notches or seats [3, thus preventing all circumferential movement of the laminae with relation one to the other. As here shown, each locking member is arcuate in form and has its end portions l5 bent inwardly to conform to the inclination of the notches I 3. The 2 intermediate portions of the locking members are spaced from the adjacent edges of the laminae so as to provide passageways between the locking members and the laminae which will permit of the circulation of 'air to ventilate the windings. When the several laminae have been placed in proper relative positions the locking plates may be slipped into the corresponding recesses from one side of the stator. The locking members or plates M are held against lateral displacement and the several lamina: held against axial displacement by means of side members or plates I6 arranged on the respective sides of the stator and engaging the outermost laminae. The side members or plates [6 are arranged in line with the projections ll of the lamina and are connected with the adjacent ends of the corresponding locking plates l4. Preferably each end of each locking plate is provided at each side thereof with a laterally extending 40 lug H, which lugs extend beyond the outermost lamina: on the respective sides of the stator. Each side plate is provided near its ends with openings l8 through which the lugs of the respective locking plates extend and in which these lugs are rigidly secured. In the present instance, the ends of the lugs, after being inserted in the side plates, are upset or riveted to rigidly connect the side members with the locking members, as shown at IS! in Fig. 4. The several parts of the stator may be quickly and easily assembled by placing the laminae, locking plates and side plates in their proper positions and then inserting the assembled parts in a press which will pressthe lamina into him engagement one with the other and upset the ends of the lugs ll to rigidly connect the several parts of the stator. The projections ll of the lamina and the side plates l6 are provided respectively with openings 29 and 2| to receive the bolts 22 whichconnect the end frames 25 with the stator. In the present instance, the openingsv 20 in the lamina are of a diameter: substantially larger than the. bolt 22 but this is immaterial as theopenings are made large to enable them to receive pilot pins on the punch which forms the lamina and so far as the construction and operation of the stator is CODY-1 cerned these openings may be just large enough to receive the bolts. It is also desirable. that after the several parts of the" stator have been rigidly connected the edges of the locking plates and of the side plates should be rabbetted as shown at 23; and 24, to receive the overlapping edges of the end frames, as shown in Figs. 3' and It will be noted that due to the inclination of the slots l3'the' rivet lugs i'l are'spacedin-i wardly beyond'tiieiine of: the rab'bet. 7

Thelam-ina areot such shape? that they may punched from sheet metal with-very little wasteg-it-being understood that. the centralopening in each lamina; is formed: by punching an armature lamina from: the: blank stock prio" to the formation-of the statorlaminav The desired number of lamina may be quickly assembled, with the projections in line,.and1the lock-ing plates slipped into place; Thesideplates aretherr applied and the assembled structure placed in. the

prss aiid' the" laminae pressed i'ntdengagement one'w itnthe: other and the rivet lugs upset to rigidly secure the several parts in their assembled positions; The" only machine work necessary isthe turning of the; rabbets '23 and 24 subsequent to theassemblingrof the stator; Consequently the stator can be" produced at a -very lowcost andthe finished stator is not only highly emcient'in operation but'isof a very strong rigid character;- 7

While I have shown anddescrib'ed one embodimerit of my invention I Wish= it; to be understood that I d'O not desire to be limited. to the' details theteofi as varibus' modifications may occur toa personskilled in the art.

Having now fully described my invention, what I claim as new and desire" to secure by Letters 1 In an electrical apparatusi' a stator comprising a plurality'o'f lamina and a' plurality of looking members extending; circum-ferentially of said stator arid'ea ch havingits opposite ends arranged transversely to the peri heral edges of said laminae, the adjacent ends of the severallocking members being spaced one from the other and separately connested with said lamina and form'- th'e sol'ehri eifi's for holding said lamina against circumferential?displacement with rela tion one to' 'the other;

Y 2-. In an electricalapparatusastator'comprising a plurality of laminae, a plurality of locking members e'xtendi'rig circumferentiall'y of said 1 statbrandeacnhaving its opposite ends arranged transversely" to the peripheral edges of said lamina;- theehds 'ofa'd-jacent locking members being sp'a'c'ed one from: the other'and engaging said; laminae along separated lines to: hold the latter againstrelativecircumferential displacementg-and connecting members extending between and connectedwiththe separated ends of adjacent locking-members; r I

3. an electrical apparatus; a stator comprise ing a plurality of laminae, a plurality of locking members extending circumferentially of said stator and each having its opposite ends arranged transversely to the peripheral edges of said lamina, the ends of the several locking members being spaced one from the other and separately engaging said lamina to hold the latter against relative circumferential. displacements and connecting membersextending between and connected with said adjacent ends of said locking members, said connecting members having parts engaging the outermost lamina to hold the several lamina against relative lateral displacement.

4.:In an electrical apparatus, a stator comprising a plurality of lamina, a plurality of locking members extending circumferentially of said stator, each locking member having opposite edges extending transversely to and connected withtheperipheral edges of the several lamina,

respective sides of: said stator, and means for rigidly connecting. said side members with the respective locking members;

6. In an electrical apparatus, a stator com,- prising, a plurality of lamina, a plurality of locking members extending circ'umferentially of said stator, each locking member having opposite edges extending transversely to and connected with the peripheral edges of the several lamina, side members engaging the outer lamina at the respective sides of saidfstator, said side members and the respective locking members having interengaging parts to rigidly connect. the same one to the other.

7. In an electrical apparatus, a stator comprising a plurality'of lamina; each laminahaving' a plurality of pairs of" opposed peripheral seats, the corresponding seats of the several laminae being in: line one with the other, a plurality of locking members extending circumferentia-lly of said-stator, each locking member having its ends arranged transversely to the pe ripheral edges of said lamina and engaging the respective seats of one pair of seats, the seats for each locking member being spaced from the seats. for the adjacent locking members, and members other than said circumferential. members extending between the adjacent pairs:..of seats and secured to the respective locking. members exteriorly of said recesses to; connect the latter one to the other and to retain the same in-en'gag'ement'wi'th saidrseats. V

8. In an electrical apparatus, a stator comprising a pluraliw of lamina, each lamina having a plurality of pairs of opposed peripheral seats, the corresponding seats of the several lamina being in line one with the other, a plurality of locking members extendingcircumferentially of said stator,,eacl 1 locking member having its ends arranged.tra11sversely to the periph: eral edges of said lamina and engaging therespective seats or" onepair of seats, and other members extending between the adjacent'pairs of ing members having interlocking parts to connect the several members one to the other.

9. In an electrical apparatus, a stator co prising a plurality of laminae, each lamina having a plurality of pairs of opposed peripheral seats, the corresponding seats of the several laminae being in line one with the other, a pl reality of locking members extending eircumferentially of said stator, each locking member having its ends 10' arranged transversely to the peripheral edges of said laminae and engaging the respective seats of one pair of seats, and members other than said circumferential members extending between and secured to adjacent locking members the last mentioned members having parts engaging said lamina to hold the latter in firm engagement .one with the other.

10. In an electrical apparatus, a stator com prising a plurality of laminae, each lam a having a. plurality of pairs of opposed peripheral seats, the corresponding seats of the several laminae being in line one with the other, a plurality of locking members extendin circumf rentially of said stator, each locking member hav ing its ends arranged transversely to the peripheral edges of said laminae and engaged with the respective seats of one pair of seats having parts projecting beyond the respective cute most lamina: and side members secured to said parts of said locking members and engaging the cutermost laminae.

11. In an electrical apparatus, a stator comprising a plurality of laminae, a plurality of locking members extending circumferentially of said stator, each locking member having opposite edges extending transversely to and connected with the peripheral edges of the several lamina, and a plurality of members arranged at each side of said stator, eachiof said side members being firmly secured to two of said locking members.

12. In an electrical apparatus, a stator comprising a plurality of laminae, each lamina having a plurality of pairs of opposed peripheral seats, the corresponding seats of the several laminae being in line one with the other, a plurality of locking members extending circumferentially of said stator, each locking member having its ends arranged transversely to the peripheral edges of said laminae and engaged with. the respective seats of one pair of seats, and a plurality of members on each side of said stator, each of said side members extending between two of said locking members and being secured to the adjacent ends of said locking members.

13. In an electrical apparatus, a stator comprising a plurality of laminae, each lamina having a plurality of pairs of opposed peripheral seats, the corresponding seats of the several laminae being in line one with the other, a plurality of locking members extending circumferentially of said stator, each locking member having its ends arranged transversely to the peripheral edges of said laminae and engaged with the respective seats of one pair of seats, and a plurality of members on each side of said stator, each of said side members being arranged between adjacent locking members and said locking members and said side members having interengaging parts to connect the same one to the other.

14. In an electrical apparatus, a stator comprising a plurality of laminae, each lamina having a plurality of pairs of opposed peripheral seats, the corresponding seats of the several laminae being in line one with the other, a pluhaving openings to receive said parts of said adjacent locking members.

15. In an electrical apparatus, a stator comprising a plurality of laminae, each lamina having a plurality of pairs of opposed peripheral seats,

the corresponding seats of the several lamina; being in line one with the other, a plurality of locking members extending circumferentially of said stator, each locking mem er having its ends arranged transversely to the peripheral edges of said lamina: and engaged with the respective seats of one pair of seats, and a plurality of members spaced. about t e outermost laminae at each side of said stator, each side member extending between two adjacent locking members and having an opening near each end thereof, locking members having lugs extending through the respective side members and upset to rigidly connect said side members with the respective locking members.

16. In an electrical apparatus, a stator comprising a plurality of laminae each having a plurality of pairs of opposed notches in the edge thereof, the corresponding notches of the several laminae being alined to form a continuous recess, a plurality of plates spaced circumferentially about said lamina and each having its ends seated in the respective recesses of one pair of recesses, and a plurality of side plates on each side of said stator, each side plate being connected with two of said c rcumferential plates.

17. In an electrical apparatus, a stator comprising a plurality of lamina each having a plurality of pairs of opposed notches in the edge thereof, the corresponding notches of theseveral laminae being alined to form a continuous recess, a plurality of plates spaced circumferentially about said laminae and each having its ends seated in the respective recesses of one pair of recesses, and a plurality of side plates, on each side of said stator, each side plate extending between adjacent circumferential plates and having an pening near each end thereof and said circumferential plates having rivet lugs extending through the openings in the respective side plates and upset to connect said plates one to the other.

18. In an electrical apparatus, a stator comprising a plurality of laminae each having a plurality of pairs of opposed notches in the edge thereof, the corresponding notches of the several laminae being alined to form a continuous recess, a plurality of plates spaced circumferentially about said laminae and each having its ends seated in the respective recesses of one pair of recesses, and having its intermediate portion spaced from the edges of said laminae, and a plurality of side plates on each side of said stator, each side plate being arranged between and connected to the adjacent ends of two circumferential plates.

19. In an electrical apparatus, a stator comprising a plurality of lamina, each lamina having a series of peripheral projections spaced about the circunL erence thereof, the corresponding projections of the several lamina being arn ed i a nement an each p i etiq c havin a no ch e ch thereof p ates at end n etwe n a ja t r p o p i stions each ba ns i v e s s t d n. h n hes 11.1. the ad a ent r ups of oj ct o d plates aging e es ive p o c n oi the qut rmos am n at each side of said stator, and means for CQI}? necting each side plate with two of the f rst men-- tioned plates.

20- I? n electrical pp tu a s atorom.- prising a plurality of laminae, each lamina having a series of peripheral projections spaced about they circumference thereof, the. corresponding projections of the several laminae being arranged in j alinernent and each projection having an inward-v 1y sloping notch in'each end thereof, plates exndi g b twe n adjacent groups of proiectiohs each plate having its ends sloping inwardly and seated in the notches in said adjacent groups of projections, side plates engaging the. respective projections of the outermost lamina at each side of said stator, and means for connecting each side plate with two of the first mentioned plates.

21." in an electrical apparatus, a stator] com-, prising a plurality of laminae, each lamina having a series ofperipheral projections spaced about the circumference thereof, the corresponding pro.- jections of the several laminae being arranged in alinernent and each projection having a notch in each end thereof, curved plates extending between adj c nt. oups o o ecti each la h vi its ends seated in the notches in said adjacent groups of projections, the interi nediate portions of said plates being spaced from the edges of said laminae, side plates engaging the respective pro:

jections of the outermost lamina at each side of said stator, and means for connecting each side Plat with two of the first mentioned plates.

' 22 In an electrical apparatus including a sta-, tor, and end frames arranged at the opposite sides of and rigidly secured to said stator, said stator, comprising a plurality of laminae, a plurality of locking members arranged circumferentially of said stator and each having its opposite ends extending transversely to and rigidly connected ith the Pe ph ral e g of sa d la i a said peripheral edges of said laminae, a plurality e si m mb s ha in h a ed es ad acen t the de el ai St o li a l l w t m er o ec v th e ebr-tiens i her ee'e ve 2 frames.

4731 a ec ri a a p a u in ludin a ate: a

tor, and end frames arranged at opposite sides of an rigidly s c e o sa d stat r. each dame having an inwardly extendmg portion to. engage said stator, said stator comprising a pluralit of lamina, a plurality of locking plates arranged cirr, 1g

cumferentiall of said stator and each havin 12$. opposite ends extending across and engaging the; peripheral edges of said laminae, and'means to rigidly u e sa d c n plates to said ae ee ai l t la s. ha i t r al d e eri It. t o oov o w e he nn r d ertie s Q? the respective end frames. 7 V 2 In an electrical apparatus including a stat and e d ram s ar ang at opposite ides'o nd i d y eem d to s d ta r ea h end r me 2 avin an inwa dly ex endin no tien to gage a d t t r a d s ate? tom ri in a ural 0i l m na a rality o; l tkm la es arra ed e mf r nt a l sai tato and. ach havi its epmsite en s x endin ac o s and, e ga in of side a e r a a e ch ide sf ai st t and each rigidly connected with twp of sa i Pla v sa lockin late are sa l's h v the dg e ie s. rooved to reg re the inner edge portions of said end frames.

In n e e r al pa atus. sit e i ri e a p ra it of lamin ea h having t a erelit o pairs o DPGitelY inc ned no n the we ee v, h not hes 91 e ch I? facin each a:

t er an the c r spond ng me h n, th Stil eral a in bei a n d' ransversel t9 h stator to form a continuous recess, a plurality of P at s s a d c r umfe n ie r about said am na an ch ha i it ends atedin hei'spettiv' in,

inclined recesses of one pair of recesses, and an at ea h d i said ate; 9 Pl I-l sa la s aga n t mq le nt w th r atien 9 ai amin i GEQBQE. 45 

